Exam Bundle

That observation verifies acl applied wrong direction in a different situation, such as when an extended IPv4 ACL correctly describes unwanted inbound traffic but was attached outbound on the wrong router interface. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.

That observation verifies router control-plane versus interface acl in a different situation, such as when an engineer relies on a transit ACL to protect all router CPU services even though router-destined flows use different paths. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.

That observation verifies acl implicit deny in a different situation, such as when a router ACL was built with one permit line and unexpectedly blocks all other traffic. For the reported ipv6 nd permitted behavior incident at a finance network core in Zurich, the required acceptance evidence is: Neighbor solicitation and advertisement function while prohibited IPv6 data traffic is still blocked. This other result does not test that condition directly.

That approach is relevant to ospf area mismatch, such as when two OSPF routers on one link receive hellos but use different area identifiers, preventing adjacency. That is a different root cause from the ospf hello/dead mismatch fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Both sides report matching timer settings and a stable adjacency forms.

That approach is relevant to ospfv3 router id, such as when oSPFv3 IPv6 adjacency does not initialize properly because a unique 32-bit router ID has not been configured in the routing process. That is a different root cause from the ospf hello/dead mismatch fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Both sides report matching timer settings and a stable adjacency forms.

That approach is relevant to ospf authentication mismatch, such as when an OSPF neighbor receives hellos but rejects authenticated packets because key or mode differs across the link. That is a different root cause from the ospf hello/dead mismatch fault observed at a carrier-adjacent enterprise in Tokyo. Applying that approach alone would not establish the required result: Both sides report matching timer settings and a stable adjacency forms.

That observation verifies ospf exstart mtu in a different situation, such as when oSPF neighbors get stuck in Exstart/Exchange and database description packets advertise incompatible MTUs. For the reported ospf hello/dead mismatch incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Both sides report matching timer settings and a stable adjacency forms. This other result does not test that condition directly.

That observation verifies ospf authentication mismatch in a different situation, such as when an OSPF neighbor receives hellos but rejects authenticated packets because key or mode differs across the link. For the reported ospf hello/dead mismatch incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Both sides report matching timer settings and a stable adjacency forms. This other result does not test that condition directly.

That observation verifies ospf dr bdr network type in a different situation, such as when a point-to-point link is configured with an OSPF broadcast network type and displays an unnecessary DR election. For the reported ospf hello/dead mismatch incident at a carrier-adjacent enterprise in Tokyo, the required acceptance evidence is: Both sides report matching timer settings and a stable adjacency forms. This other result does not test that condition directly.

That approach is relevant to dhcp relay udp filtering, such as when router helpers are correctly configured but remote clients time out because DHCP request/response UDP transport is blocked between relay and server. That is a different root cause from the dhcpv6 relay missing fault observed at a nationwide chain in Tokyo. Applying that approach alone would not establish the required result: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration.

That approach is relevant to dhcp default router option, such as when clients obtain an IPv4 address and mask but have no valid default gateway because the pool's default-router option is incorrect. That is a different root cause from the dhcpv6 relay missing fault observed at a nationwide chain in Tokyo. Applying that approach alone would not establish the required result: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration.

That approach is relevant to dhcp giaddr subnet selection, such as when a central DHCP server selects the wrong scope for remote clients because the relay's gateway address is unexpected. That is a different root cause from the dhcpv6 relay missing fault observed at a nationwide chain in Tokyo. Applying that approach alone would not establish the required result: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration.

That observation verifies dhcp relay helper address in a different situation, such as when broadcast DHCPDISCOVER packets from remote VLAN clients never reach the central DHCP server. For the reported dhcpv6 relay missing incident at a nationwide chain in Tokyo, the required acceptance evidence is: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration. This other result does not test that condition directly.

That observation verifies stateless dhcpv6 with slaac in a different situation, such as when a VLAN wants SLAAC-generated addresses with DHCPv6 providing other information, but the router advertises the managed-address stateful flag. For the reported dhcpv6 relay missing incident at a nationwide chain in Tokyo, the required acceptance evidence is: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration. This other result does not test that condition directly.

That observation verifies dhcp exhausted pool in a different situation, such as when clients suddenly receive no DHCP leases at a busy branch even though relay packets reach the server. For the reported dhcpv6 relay missing incident at a nationwide chain in Tokyo, the required acceptance evidence is: The DHCPv6 server processes relayed requests and clients receive intended IPv6 configuration. This other result does not test that condition directly.

That approach is relevant to tunnel ipsec profile binding, such as when spoke-to-hub GRE packets are being sent without the required encryption because no tunnel protection profile is attached. That is a different root cause from the dmvpn tunnel key inconsistency fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: Tunnel encapsulation is accepted consistently and expected peer packets pass.

That approach is relevant to dmvpn mgre hub, such as when a single-hub DMVPN must support many dynamically registered spokes, but the hub tunnel is configured as a fixed point-to-point GRE tunnel. That is a different root cause from the dmvpn tunnel key inconsistency fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: Tunnel encapsulation is accepted consistently and expected peer packets pass.

That approach is relevant to dmvpn peer-state cli, such as when tunnel interfaces show up/up but the team has not checked whether NHRP peers are registered and active. That is a different root cause from the dmvpn tunnel key inconsistency fault observed at a logistics hub in Berlin. Applying that approach alone would not establish the required result: Tunnel encapsulation is accepted consistently and expected peer packets pass.

That observation verifies dmvpn peer-state cli in a different situation, such as when tunnel interfaces show up/up but the team has not checked whether NHRP peers are registered and active. For the reported dmvpn tunnel key inconsistency incident at a logistics hub in Berlin, the required acceptance evidence is: Tunnel encapsulation is accepted consistently and expected peer packets pass. This other result does not test that condition directly.

That observation verifies eigrp dmvpn peer issue in a different situation, such as when dMVPN peers have protected tunnel reachability but EIGRP never forms because routing is not active on tunnel interfaces. For the reported dmvpn tunnel key inconsistency incident at a logistics hub in Berlin, the required acceptance evidence is: Tunnel encapsulation is accepted consistently and expected peer packets pass. This other result does not test that condition directly.

That observation verifies nhrp cache verification in a different situation, such as when a direct spoke route exists but its tunnel next hop lacks a corresponding NHRP resolution entry. For the reported dmvpn tunnel key inconsistency incident at a logistics hub in Berlin, the required acceptance evidence is: Tunnel encapsulation is accepted consistently and expected peer packets pass. This other result does not test that condition directly.

That approach is relevant to copp ospf hello starvation, such as when oSPF adjacencies flap only during bursts because CoPP control-plane policing drops routed protocol hellos. That is a different root cause from the copp snmp polling impact fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds.

That approach is relevant to copp protection against cpu attack, such as when high-rate packets addressed to router management services exhaust CPU while transit interfaces remain uncongested. That is a different root cause from the copp snmp polling impact fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds.

That approach is relevant to copp bgp keepalive drop, such as when an overly strict CoPP policer drops BGP keepalives and neighbors repeatedly expire their hold timers. That is a different root cause from the copp snmp polling impact fault observed at a government campus in Canberra. Applying that approach alone would not establish the required result: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds.

That observation verifies copp http management in a different situation, such as when hTTPS management packets from authorized administrators are incorrectly classified with untrusted HTTP management probes. For the reported copp snmp polling impact incident at a government campus in Canberra, the required acceptance evidence is: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds. This other result does not test that condition directly.

That observation verifies copp bgp keepalive drop in a different situation, such as when an overly strict CoPP policer drops BGP keepalives and neighbors repeatedly expire their hold timers. For the reported copp snmp polling impact incident at a government campus in Canberra, the required acceptance evidence is: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds. This other result does not test that condition directly.

That observation verifies copp ssh throttling in a different situation, such as when remote SSH login attempts time out because the management class policer is too low for legitimate maintenance bursts. For the reported copp snmp polling impact incident at a government campus in Canberra, the required acceptance evidence is: Authorized SNMP polls succeed and exceeded-drop counts remain within accepted thresholds. This other result does not test that condition directly.

That approach is relevant to longest prefix before ad, such as when a host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. That is a different root cause from the pbr on wrong interface fault observed at an airport infrastructure network in Dubai. Applying that approach alone would not establish the required result: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing.

That approach is relevant to route-map attachment direction, such as when a prefix policy meant to constrain inbound BGP routes is applied only outbound to the peer. That is a different root cause from the pbr on wrong interface fault observed at an airport infrastructure network in Dubai. Applying that approach alone would not establish the required result: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing.

That approach is relevant to ospf virtual link transit, such as when an attempted virtual link traverses a stub transit area, causing backbone repair to fail. That is a different root cause from the pbr on wrong interface fault observed at an airport infrastructure network in Dubai. Applying that approach alone would not establish the required result: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing.

That observation verifies bfd versus routing discovery in a different situation, such as when an engineer deploys BFD and assumes it will discover routes without an associated routing or tracking client. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.

That observation verifies ibgp next-hop preservation in a different situation, such as when a router learns an eBGP route through iBGP but its NEXT_HOP points at an unreachable border address. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.

That observation verifies longest prefix before ad in a different situation, such as when a host matches an OSPF /24 and a lower-AD static /16; operations assumes the static summary must forward the packet. For the reported pbr on wrong interface incident at an airport infrastructure network in Dubai, the required acceptance evidence is: Matching inbound traffic follows the policy next hop while unmatched traffic continues normal routing. This other result does not test that condition directly.